Cutting machine



Oct. 13, 1925.'

N. E. BOOTH CUTTING MACHINE Filed Aug, 3, 1922 :WE/vraie' NELSON Boo-ml WAM@ A TTU/WHS Patented Oct. 13, 1925.

j 1,556,581 TENT OFFICE.

NELsON E.BOOrH, OF BROOKLYN, NEW YORK.

CUTTING- MACHINE.

Aipplicatonlediug'ust 3, 1922. Serial No. 579,508.

To aZZ whom t may concern:

Be it known that I', NELSON E. BOOTH, a citizen of the United States, residing at Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Cutting Machines, Yof which the following is ay specification.'v

The principalob-ject of this invention is to provide a new and improved construction in a cutting machine by means of which a longitudinal motion of the cutting knife is producedA simultaneously with lthe down- -ward motion ofthe knife to thereby effect -ashearing cut.- f

Another object is to vsimplify the construction of-the means for producing the longitudinal motion o-f the knife and thereby decrease the manufacturing as well as maintenance costs of a device of this type. A further Object is to lprovide a means for adjusting the longitudinal motion producing means so as to vary the extent of the longitudinal motion according to the thickness of the material' beingfoperated upon.

lhile I amaware that numerous cutting machines have beenv `designed in which means have been provi-ded for producing a. longitudinal Vor 4shearing cut of the knife, all such machines with Y.which I am familiar produce the shearing cut by moving the,` knife carrier# longitudinally and as theknifeicarrier must-be so constructed aslto withstand. the strain of the heavy 4pressuresV necessary to force the cutting blade through stiff and compact masses of material, it is necessary-inthese machines to make the `carrier of large and heavy castf ings, thereby entailing the expenditure of large' amounts Vof power to operatethe ma. chine. 'Again, because of the great weightY of the parts, the machines kmust be vgeared to run slowly, Votherwise-'.they would knot stand up because tof the-jars, and shocks whichwould be produced by the starting and reversal of the heavy knife carrier.

A further object of this invention is there-y fore to overcome the objections and diflicul- 'ties enumerated above by: confining. the mo- -tion ofthe knife carrier to an up and downk reciprocation and-'by mounting the knife within the carrier for longitudinal reciprolcationto produce-a comparatively light machine which vcariche run at greater-speeds than the machines-of the type vreferred to, and as a result thereof obtainia-greater outffputQricapacitafromfthefmaQhae-a f y,ciprocation o-f the carrier. .of the rod. 16 is pivotally connected to the For the accomplishment of these and such further objects, as will hereinafter be apparent to `those skilled in the art to which this appertains, the invention consists in the construction, combination and arrangement of parts herein specifically described and illustrated in the accompanying drawings,

whereinis shown a preferred embodiment of the invention, but it is to be -understood thatfchanges, variations and modifications may be resorted to which fall within the scope of the claims hereunto appended. .In the drawings forming a portion of this specification Fig. lis a front elevation partly in lsection ofa machine embodying-my invention.

= jFig. 2 is a similar partialview of a modification. v

Fig.. 3 is a sectionk on the line 3.-3 of s shown in the drawings, the numerals and 'l1 indicate the side frames of; the

machine which .are held together at their tops bythe usual crossheadlQ. The side .frames arev provided with suitalolev slotted lguide ways 14 in which isslidably mounted the knife carrier 15 which extends outwardly .beyond `theside framesto provide Va means forV attaching the combined actuating and .adjusting rods 1,6. The rods 16 pass through ,threads upon the `rod 16, sothat kthe turning of the .wheellwill vary the pathy of re- The lower end upper end connecting'link 19, thelower end of which: is connected to an eccentric or crank arm by means of which the desired vertical reciprocation of the knife is ob-V tained. l. As the particular means for secur ingthe vertical reciprocation of the knife :forms .no part of the present invention, it has Lnot 4been thought necessary to' illustrate this .part of the machine, it being understood that any desirable means may be resorted to and that means to adjust or regulate. the extent Vof the-vertical-stroke will be incorporated therein.' 'f

The under yface. of the knife carrier `is preferably slotted as indicated bythe nu- .meral lto provide` a guidewayfor the uknifevblade 21,-a series of antifrictionrollers ,22 being mounted upon pins23. between the upper edge of the knife and the lower Lace of the slot 20. The knife is retained within the carrier by means of a pin 24, which is held in snug engagement within a suitable aperturev provided adjacent the upper part of the knife and which extends from opposite sides of the knife and freely through longitudinal slots 25 adjacent the lower edge of the carrier.

The means for causing the longitudinal motion of the knife consists in providing the edge of the knife adjacent, the side frame ll with an inclined surface 2G which is adapted to engaoe against a cooperating inclined cam surface`27 at the base of a slot 27a provided in the cam block 28 which is adiustably mounted as by the bolts 29 to the side frame 1l, suitable means such as the lock nuts 30 being provided to hold the cam block in ad- .justed position.

Means are provided to return the knife to the right hand side of the machine as it travels upwardly and may comprise a roller 8l rotatably mounted upon the pin 32 in the guide way of the side frame lO and which roller engages in incliner surface 33 provided upon the left hand side of the knife.

A modified means of securing the return movement of the knife is shown in Fig. 2. and consists of the provision of a pair of coil springs 34 (only one of which is shownl one end of each spring being secured to the adjacent projecting end of the pin 24 and the other end being suitably ancho-red to the carrier as by means of the pin 35.

The operation of the machine is as follows, the driving means for the machine being set in operation the knife carrier descends, the inclined face 26 of the knife contacting with the inclined surface 27 of the cam block 28 and causing the knife to move longitudinally from right to left, to produce a shearing cut. As the carrier ascends the knife is carried upwardly, the pin 24 preventing the knife from falling out of the carrier. In the form shown in Fig. l the inclined surface 33 is engaged by the roller 3l, thus causing the knife to be pushed from left to right and returned to its original position.

During the downward cutting stroke the thrust of the knife is taken up by the rollers 22 and transmitted by the rollers to the carrier, the rollers permitting the free longitudinal .motion of the knife, it being understood that the pin 24 is free enough in the slots 25 to offer no resistance to the longitudinal motion. During the upward stroke there is no strain upon the pin 24 except that due to the weight of the knife. Consequently the pin 24 is amply strong enough to support this weight.

ln the form shown in Fig. 2, the return movement of the knife is produced by means of the springs 34.

The screws 29 and nuts '30 provide a means for adjusting the cam block 28, so as to regulate the longitudinal motion of the knife according to the thickness of the material to be cut. If the thickness of the material is substantially equal to the full stroke of the knife, the cam block will be set inwardly so that the inclined surfaces 26-27 will start to contact as soon as the cutting stroke of the knife commences. 1f thinner material is to be cut the cam block 28 is moved outwardly a suitable amount to cause contact of the cam surfaces 2627 immediately before the cutting action begins.

Having thus described my invention, r

what l claim as new and desire to secure by Letters Patent, is

l. In a cutting machine, a frame, a knife carrier mounted for reciprocation therein, means to reciprocate said carrier, a knife slidably mounted within said carrier, said mife provided with an inclined cam surface, a cam block adjustably carried by said frame and having a cooperating inclined cam surface adapted to engage the inclined surface of said knife upon the cutting stroke and move said knife longitudinally of said carrier and resilient means to move said knife longitudinally in the opposite direction upon its upward stroke.

2, In a cutting machine, a knife carrier, means to reciprocate said carrier, said carrier provided with a knife receiving groove, a knife slidably mounted in said groove, a plurality of antifriction rollers mounted between the inner edge of said groove and the inner edge of said knife and adapted to transmit the cutting thrust from said carrier to said knife and means to retain the knife within said groove.

3. In a cutting` machine, a knife carrier, means to reciprocate said carrier, said carrier provided with a knife receiving groove, a knife slidably mounted in vsaid groove, a plurality of antifriction rollers mounted between the inner edge of said groove and adjacent edge of said knife and adapted to transmit the cutting thrust from said carrier to said knife, means to retain the knife within said groove, and means to move said knife longitudinally.

4. In a cutting machine, a knife carrier mounted for reciprocation therein, means to reciprocate said carrier, a knife slidably mounted within said carrier, cam means to move said knife longitudinally of said carrier in one direction, means to move said knife in the opposite direction, said cam means being slidably and adjustably mounted to permit the longitudinal motion of said knife to be regulated according to the thickness of the material to be operated on and means ito lock said cam means in adjusted position. f

5. Ina cutting machine, a knife carrier,

means to reciprocate said carrier, said carrier provided with a knife carrying guide, a knife slidably mounted in said guide7 a plurality of antifriction rollers mounted between said carrier and knife adapted to transmitJ the cutting thrust from said carrier to said knifej means to retain the knife Within said groove, means to engage said knife during its cutting stroke, means to move said knife longitudinally in one direction and resilient means to normally move said knife in the opposite direction.

6. Iii a cutting machine, a knife carrier,

means to reciprocate said carrier, said carrier provided With a knife carrying guide,

a knife slidably mounted in said guide, a plurality of antifriction rollers mounted between said carrier and .knife adapted to transmit the cutting thrust from said carrier `to said knife, means to retain the knife Within said groove, means tO engage said knife during its cutting stroke, means to move said knife longitudinally in one direction and resilient means connected With said knife retaining means and said carrier.

In testimony whereof I have affixed my signature.

NELSON E. BOOTH. 

